Barges offer high volume shipping and avoid the restrictions of road and rail transport. Ron White, vice president-project cargo for McDonough Marine Service discusses the state of the barge industry, special considerations for shipping by barge and what's ahead for North America's waterways. Richard Grayson, charter specialist from ConocoPhillips discusses the company's US$3 billion Wood River refinery project that used barge transport as its primary mode of delivery.